There is no such thing as how often lung nodules become cancerous. Lung nodules have the possibility of malignant changes, some lung nodules are stable and have no obvious symptoms, they are tuberculosis, bronchial cysts, pulmonary isolation and so on. It may also be accompanied by lung nodules for life. Some of the lung nodules are in the early stage of lung cancer. Some lung nodules have no obvious symptoms, but if the disease develops, it may cause cough, chest tightness, chest pain or even dyspnea, and some are accompanied by fever. In order to understand the condition, patients should do chest X-ray, blood test, and pathology biopsy if necessary. In order to prevent cancer, patients with lung nodules should consult the doctor in time, do the examination early, understand the cause of lung nodules and follow the standardized treatment, and do not be negligent to avoid delaying the condition.